12123538535 has 16 divisors (see below), whose sum is σ = 14698854432. Its totient is φ = 9598512000.

The previous prime is 12123538523. The next prime is 12123538541. The reversal of 12123538535 is 53583532121.

It is a happy number.

12123538535 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12123538535 - 2²² = 12119344231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1602632 + ... + 1610178.

It is an arithmetic number, because the mean of its divisors is an integer number (918678402).

Almost surely, 2^12123538535 is an apocalyptic number.

12123538535 is a deficient number, since it is larger than the sum of its proper divisors (2575315897).

12123538535 is a wasteful number, since it uses less digits than its factorization.

12123538535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10834.

The product of its digits is 108000, while the sum is 38.

The spelling of 12123538535 in words is "twelve billion, one hundred twenty-three million, five hundred thirty-eight thousand, five hundred thirty-five".